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And unlike the ups and downs of solar and wind, these cows provide a constant source of electricity.
和太阳能和风能的不稳定不同，这些奶牛能提供稳定的电能。
《America Revealed》《透视美国》
双语例句
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The threat of losing their jobs is a constant source of worry to them.
丢掉工作的威胁时常使他们忧心忡忡。
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Throughout the house, the views are a constant source of surprise and delight.
整个房子，目之所及不停带来惊奇和欣喜。
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God's love is a constant source of comfort to me.
神的爱持续地是我的安慰之源。
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Many in the US saw Mexico as a constant source of instability.
很多美国人认为墨西哥是造成美国不稳定的根源之一。
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A constant source of debate regarding loop performance is which loop to use.
循环性能争论的源头是应当选用哪种循环。